The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1977
Filed:
Jun. 21, 1976
Applicant:
Inventors:
Joseph Brian Wareing, Chester, EN;
Herbert Hall, Wakefield, EN;
Assignees:
The Electricity Council, BOTH OF, EN;
Johnson & Nephew (Non-Ferrous) Limited, BOTH OF, EN;
Primary Examiner:
Int. Cl.
CPC ...
B21D / ; C23C / ; F27D / ;
U.S. Cl.
CPC ...
72 38 ; 29DI / ; 72 46 ; 72342 ; 118 50 ; 432242 ;
Abstract
A seal for permitting a wire to be fed through a wall separating regions at different pressures, e.g. into and out of a vacuum chamber for heat treatment or coating, comprises a pair of die-shaped elements of hard rigid material each having a bore for passage of the wire, these elements being spaced apart in a tube extending through said wall, means for pumping air from said tube, and an internal wire guide in said tube adjacent one of said holders and having an internal diameter decreasing towards that holder.